move.js说我第二行 Uncaught TypeError: Cannot read property 'currentStyle' of undefined
function getStyle(obj,attr){
if (obj.currentStyle) {
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
function startMove(obj,attr,iTarget,fn){
clearInterval(obj.timer);
obj.timer =setInterval(function(){
var icur = 0;
if (attr =='opacity') {
icur = Math.round( parseFloat(getStyle(obj.attr))*100);
}
else{
icur = parseInt(getStyle(obj,attr));
}
var speed =(iTarget-icur)/8;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if (icur==iTarget) {
clearInterval(obj.timer);
if (fn) {
fn();
}
}
else{
if (attr=='opacity') {
obj.style.filter='alpha(opacity:'+(icur+speed)+')';
obj.style.opacity =(icur+speed)/100;
}
else{
obj.style[attr] =icur+speed+'px';
}
}
},30)
}
